Spraying booth



H. J. STANLY SPRAYING BOOTH Jan. 30, 1962 3 Sheets-Sheet 1 Filed July 1,1959 FIG. 1

INVENTOR HENRY JOSEPH STANLY BY 7 E 2 e d- ATTORNEYS Jan. 30, 1962 H. J.STANLY 3,

SPRAYING BOOTH Filed July 1, 1959 3 Sheets-Sheet 2 FIG. 2

INVENTOR HENRY JOSEPH STAN LY ATTORNEYS H. J- STANLY SPRAYING BOOTH Jan.30, 1962 3 Sheets-Sheet 3 Filed July 1, 1959 Ill! L ||l| IIIII.

INVENTOR HENRY JOSEPH STANLY BY WW1;

United States Patent 3,018,847 SPRAYIN G BOOTH Henry J. Stanly,Metuchen, N.J., assignor to Metalwash Machinery Company, Elizabeth,N.J., a copartnership Filed July 1, 1959, Ser. No. 824,312 Claims. (Cl.183-22) 'This invention relates in general to spraying booths and inparticular to a new and useful spraying booth including a water Wallmember which forms the front wall of an air cleaning chamber andincluding means to direct water in a sheet over the wall to collect thematerials being sprayed in the booth and wherein the wall is pivotallymounted to permit it to be swung outwardly for cleaning and removalpurposes.

The present invention is an improvement over previous devices of thischaracter particularly in the mounting of the water wall apron on apivotal bracket which permits the wall to be swung outwardly forcleaning and removal purposes. The arrangement includes a trough orreservoir portion at the upper end of the apron which is mounted on apivotal bracket member and over the forward lip of which the apron waterwall member is suspended. When the apron water wall is positioned withinthe booth it is spaced from a rear wall of the booth and defines withthis rear wall an air cleaning chamber having liquid sprays directedthereacross to thoroughly clean air which is drawn upwardly through avent in the booth. Water is continuously supplied to the trough at thetop of the apron and it overflows onto the apron and forms a watercurtain extending completely across the air cleaning chamber. When it isdesired to gain access to the cleaning chamber, it is a simple matter toswing the water wall apron member outwardly on its pivotal supportingbracket in order to permit clear access to the interior of the spraybooth at the location of the air cleaning chamber. The water wall apronmay be hung onto the forward edge ofthe trough and may be removedentirely if desired. Accordingly, it is an object of this invention toprovide a spray booth having a water wall apron member which is spacedforwardly of a rear wall in the booth and including means to directwater in a sheet over the face of the apron and wherein the apron isp-ivotally mounted so that it may be swung outwardly for access to thespace between the apron and the rear wall ofthe booth.

A further object of the invention is to provide a spray booth includingan air cleaning chamber defined between a rear wall of the booth and apivotally mounted water wall apron member.

A further object of the invention is to provide a spray booth which issimple in design, rugged in construction and economical to manufacture.

The various features of novelty which characterize the invention arepointed out with particularity in the claims annexed to and forming apart of this specification. For a better understanding of the invention,its operating advantages and specific objects attained by its use,reference should be had to the accompanying drawings and descriptivematter in which there is illustrated and described a preferredembodiment of the invention.

In the drawings:

FIG. 1 is a transverse section of a spray booth constructed inaccordance with the invention;

FIG. 2 is a fragmentary right end elevation of the spray booth indicatedin FIG. 1; and

FIG. 3 is a front elevation of the spray booth indicated in FIG. 1.

Referring to the drawings in particular the invention embodied thereinincludes a rectangular spray booth generally designated having sidewalls 12 and 14 and a rear wall 16. The spray booth 10 includes a tank18 formed at the bottom end between the lower portion of the rear wall16 and a short front wall 20. A top wall 22 includes a vent passage 24in which is positioned a bladed fan (not shown) which is rotated by amotor 26 to induce air and gas flow outwardly through the passage 24.The front of the booth 10 is provided with a large rectangular opening28 to permit articles to be sprayed to be positioned within the openingand within the spray booth.

In accordance with the invention, a rectangular trough generallydesignated 30 is suspended from the top 22 on bracket members 32 whichare pivotally mounted to the top wall at a location adjacent the frontend of the passage 24 defined therein. The bracket members 32 areadjustably fitted into pivot mounts 33. The trough 30 is supplied withclear liquid through a plurality of laterally spaced hoses 34 which arefed from a manifold pipe 36. Clear liquid is continuously circulatedfrom a tank portion 38 which is separated from the tank portion 18 by anupstanding balfie 40. A pump 42 takes suction from the tank portion 38and discharges through a riser 44 and through the manifold pipe 36 tomaintain a continuous supply of liquid to the trough 30. The liquid ispermitted to flow over the front edge of the trough onto a rectangularapron member generally designated 46 which is hooked onto the upper endof the trough 30. The water wall apron 46 is bent into a U-shape at itsupper end so that it may be hooked onto the front wall 48 of the trough30. If desired, the connection may be made permanent by welding thisapron onto the trough 3d. The trough 30 may be leveled by adjustment ofthe bracket members 32 in the pivot mounts 33.

The bottom end of the water wall apron 46 is curved so that a curtain ofliquid 50 is continuously directed downwardly therefrom into the tank18. The level of the liquid in the tank 18 is maintained sufficientlyhigh to form a continuous liquid wall between a front portion 52 of thespray booth and an air cleaning chamber portion 54 defined between theapron 46 and the rear wall 16.

The rear face of the Water wall apron 46 is provided withsemi-cylindrical bathing plates 56 which are arranged in offset opposedrelationship to semi-cylindrical bathing plates 58 formed as inwardextensions of the rear wall 16. The pump 42 is also arranged todischarge from the riser 44 to a manifold 60 which extends across theair cleaning chamber 54 at the location of the bottom baffle plate 56.The manifold 60 is provided with a plurality of laterally spacednozzles, including an upper set 62 arranged to direct a stream of liquid64 upwardly against the upper bafile plate 58 on the rear wall 16.Another nozzle set 66 is arranged to direct a stream of liquid acrossthe chamber 54 against the lower baffle 58. Air which is drawn out fromthe spray booth through the passage 24 by the fan therein is pulledthrough the water wall 50 and upwardly around the baffling through thestreams of liquid exiting from the nozzles 62 and 66. The upper portionof the bathing 58 is curved so that a stream of liquid 68 is directedacross the upper reaches of the chamber 54. Air must travel through atortuous path and through the various liquid streams and hence isthoroughly cleaned before it is drawn upwardly through the opening 24.Bafile plates 70 and 72 extend inwardly in the air cleaning chamber 54at the upper end thereof to define a tortuous air path to trap anyremaining solids entrained in the air so that the air which eventuallyexits through the open ing is thoroughly clean.

A feature of the present invention is the mounting of the water wallapron 46 which permits it to be swung from the solid line positionindicated at A in FIG. 1 to the dotted line position indicated at B inFIG. 1. Since the trough 30 is mounted on a swinging bracket 32 it alsomay be swung outwardly with the water wall apron.

If desired, the water wall apron 46 may be removed from the trough byunhooking the top end from the forward wall 48 of the trough.

When it is desired to spray an article it is positioned in the booth inthe portion 52 and the spray is directed against the article. Anyportions of the spray which do not strike the article impinge on thewater flowing downwardly over the water wall apron 46. Large quantitiesof the spray material are directed downwardly into the liquid tank 18where is settles at the bottom and may be recovered later. The bafiling58 extends downwardly in the tank 18 and it cooperates with the upwardlyextending bafile 40 to maintain the tank portion 38 full ofsubstantially clear liquid. This liquid is continuously circulated bymeans of the pump 42 both to the manifold 36 and to the manifold 60. Anyspray material which is retained in the gases and air which suround thebooth are drawn upwardly through the water curtain 50 and through theother water sheets and sprays located in the air cleaning passage wherethe remaining air entrained spray material is recovered in one or moreof the liquid streams.

Thus the invention provides a spray booth including improved liquidspraying and water wall means which is arranged to thoroughly clean theatmosphere in the location of the spraying. A feature of the inventionis the provision of a water wall apron which is arranged to receive acontinuous overflow sheet of water from a trough at the upper endthereof and which defines an air cleaning chamber between its rear faceand the rear of the spray booth. Both the trough and the water wallapron are mounted so that they may be swung outwardly for easy accessinto the air cleaning chamber or for removal of the water wall apron ifdesired.

While a specific embodiment of the invention has been shown anddescribed in detail to ilustrate the application of the inventionprinciples, it will be understood that the invention may be embodiedotherwise without departing from such principles.

What is claimed is:

1. In a spray booth of the type having a lower tank portion, a rearwall, a top wall, a vent opening defined in said top wall, a troughconnected to said top wall and arranged to depend therefrom, a liquidsupply pipe arranged above said trough having discharge aperturestherein, a water wall apron connected to said trough and arranged tosubstantially divide said spray booth into a forward portion and a rearair cleaning portion, said forward portion communicating with said aircleaning portion at the bottom of said apron and above said tank, andmeans to circulate liquid from said tank to said supply pipe; theimprovement comprising a pivotal mounting for said trough and water wallapron, said mounting including a plurality of vertically disposedbracket members secured at their lower portions to the rear wall of saidtrough and pivotally connected at their upper ends to said top wall oversaid forward portion of said spray booth, flexible hose means extendingfrom the discharge aperture in said supply pipe into the lower portionof said trough, and sealing means formed by the abutment of the upperrear edge of said trough with a portion of said top wall.

2. A spray booth according to claim 1, wherein said trough and apron maybe adjustably positioned along their pivotal connection to said topwall, whereby said trough may be leveled.

3. A spray booth according to claim 2, wherein the upper horizontal edgeof said water wall apron is formed in a U-shaped lip and is in hangingremovable engagement with the top edge of the forward wall of saidtrough.

4. A spray booth according to claim 1, further including baffle meansdefined on the rear of said apron and on the inside of the rear wall ofsaid spray booth, said baflle means including a pair of connectedsemi-cylindrical trough-like bafiles extending substantiallyhorizontally along said rear wall, joined substantially horizontalpartial cylindrical bafiies attached to the rear of said apron instaggered vertical relationship with respect to said bafiles upon saidrear wall and spray means to direct liquid against said bafiles.

5. In a spray booth of the type having a lower tank portion, a rearwall, a top wall, a vent opening defined in said top wall, a troughconnected to said top wall and arranged to depend therefrom, a liquidsupply pipe arranged above said trough having discharge aperturestherein, a water wall apron connected to said trough and arranged tosubstantially divide said spray booth into a forward portion and a rearair cleaning portion, said forward portion communicating with said aircleaning portion at the bottom of said apron and above said tank, andmeans to circulate liquid from said tank to said supply pipe; theimprovement comprising, baffie means within said air cleaning portion,said baffle means including a pair of connected semi-cylindricalbaflles, extending substantially horizontally on the inside of said rearwall, joined substantially horizontal partially cylindrical baffiesattached to the r ar of said apron in staggered vertical relationshipwith respect to said bafiles upon said rear wall and spray means todirect liquid against said bafiles.

References Cited in the file of this patent UNITED STATES PATENTS1,132,677 Murray et a1 Mar. 23, 1915 2,243,839 Dalton June 3, 19412,316,491 Teichner Apr. 13, 1943 2,883,170 Trittipoe Apr. 21, 19592,906,511 Umbricht et al Sept. 29, 1959 FOREIGN PATENTS 416,337 GreatBritain Sept. 11, 1934

